Answer:
Modern Greece, Turkey, Lebanon, Syria, Egypt, and North Africa
Explanation:
When the Western Roman Empire fell in 476 AD, only the Easterm Roman Empire was left, which would survive the entirety of the Middle Ages, known in this time period as they "Byzantine Empire".
The lands that the Byzantine Empire ruled varied over time, and when it fell to the Turk in 1453 AD, it only controlled a very small area around Constantinople.
However, at first, in the Early Middle Ages, the Byzaninte Empire controlled a vast area that comprised Modern Greece, Turkey (Anatolia), the Levant (lebanon, Syria, Palestine), Egypt, parts of the Balkans, and even parts of Mesopotamia.
